On 25/06/2019 00:37, Henri Derksen wrote:
> Hello David,
>> If this is happening the card needs to be replaced. If it wasn't a Zero
>> I'd suggest booting from a USB stick for better reliability, but as an
>> SD card is the only option, a high endurance version is probably
>> worthwhile.
>
> I have seen a Pi starting form USB stick without a SD card inserted.
> You then first need to write the write once only OTP-bit in the machine.
> It then checks if there is an USB disk to start from the Pi 3B.

Yes you can do this if you don't want to use a SD card at all. However,
I just use a small SD card to hold the BOOT partition and modify
cmdline.txt so it uses the USB stick for the main Linux partition.

> I am not sure if that OTP-bit is usable in the older Pi's and Zero machines.

I was thinking more that the Pi Zero only has one micro USB port, which
you would have to use for the USB drive. There are a very limited range
of micro USB drives, but otherwise you'd have to have a normal one
hanging off an adaptor, which would greatly increase the footprint of
the Pi Zero.

---druck

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